| 摘要 |
FIELD: electrical engineering; DC motor speed governing and controlling ac mains power supplied to heating appliances and lighting equipment. SUBSTANCE: DC drive has speed setting element, rectified bridge, power switch, electric motor whose armature is shorted out by diode and connected in series with power switch circuit; introduced in addition are voltage level recording circuit connected across two diagonally opposite terminals of rectified bridge and amplitude limiter; speed setting element is connected in parallel with isolating capacitor of voltage level recording circuit; output of speed setting element is connected through amplitude limiter to control input of power switch. EFFECT: simplified design, reduced level of noise produced by electric drive. |
